Inhibiting gum in cracked distillates



"'65 with thorough mixing.

UNITED STATES. PATENT} 'OFFlCE mnmrrmo GUM IN omormn DISTILLATES Robert E. Burk, Cleveland, Ohio, assignor to The Standard Oil Company, Cleveland, Ohio, a corporation of Ohio No Drawing. Application March 11,1930

. $erial No. 435,039

6 Claims. (or. 44-9) This invention relates to treatment of cracked which has been lye treated, and is, neutral in repetroleum distillates, and more particularly treataction, normal amyl mercaptan and di-normal ment for inhibiting gum formation therein; and propylamine are added in equal proportions to it is among the objects of the invention to provide make about 0.02 per cent., and the naphtha is a' process and product in which the tendencies thoroughly mixed; 5 toward gum formation are controlled. Another Instead of a pure amine or mercaptan, mixtures object is the provision of treatment for cracked of amines or mercaptans may be employed redistillates in a manner simple and readily apspectively. plicable to such products irrespective of the par- Other modes of applying the principle of the in- 10 ticular detail of the antecedent cracking provention may be employed, change being made as 10 cedure. Other objects and advantages-will apregards the details described, provided the steps pear as the description proceeds. or ingredients stated in any of the following To the accomplishment of the foregoing and claims, or the equivalent of such, be employed. related ends, the invention, then, consists of the I therefore particularly point out and distinctly features hereinafter fully described, and particuclaim as my invention': l5 larly pointed out in the claims, the following 1. A process of inhibiting gum-formation in description setting forth in detail certain em-. cracked petroleum motor-fuel distillates, which bodiments of the invention, these being illuscomprises subjecting the cracked distillate to the trative however of but a few of the various ways action of a normally liquid aliphatic mercaptan 0 in which the principle the invention y be soluble in the distillate and an aliphatic amine, in

employed. total amount not substantially in excess of 1 In accordance with the invention, a cracked per c t,

petroleum distillate such as is prone to develop 2. A process of inhibiting gum-formation in gum formation, issubjected, preferably in neutral cracked petroleum motor-fuel distillates, which condition, to the action of an amine and a mercomprises subjecting th r k d d tillat t captane These may be added to t d st e. action of a normally liquid aliphatic mercaptan" with Sui a e mixing. if d d 6 more soluble in the distillate and a secondary aliphatic of the consti u s m y be p vi in situamine normally liquid and soluble in the distil- Mixing y 2 accomplished batchwise, D late, in total amount not substantially in excess portionally in continuous manner, as may be preof 1 per t,

ferred. Y A cracked-petroleum motor fuel distillate n the case f distillate which contains containing the reaction product of the ingredients p the amine y be added, w Suitable thereof andanormally liquid aliphatic mercaptan m 1 amine ay be generated in S u, by soluble in the distillate and a secondary aliphatic add n a halogenated a y 00111120111111 and Sub? amine normally liquid and soluble in the distillate,

jecting to the action f amm according to my in total amount not substantially in excess of 1v copending application 389,083 filed Aug. 28, 1929, per t I v I now Patent 1,919,825. I 4. A cracked petroleum motor fuel distillate Qu e a range f rc pifln m y be availed containing the reaction product of the ingredients 40 but dinari y t i r boi ing m aptans ar thereof ands. normally liquid aliphatic mercaptan desired, for example normal amyl mercaptan, i9 soluble in the distillate and an aliphatic amine, in my nta p y m r p iii, m- A total amount not substantially in excess of amine component, an alkyl amine ispreferred, 1 per cent, a I and p r i larly a hi her'boiling amin for x- 5. A process of inhibiting gum-formation in 5 ampl -n a pr ny1am ne.dirma uty cracked petroleum distillates, .which comprises amine, etc. I subjecting the cracked distillate to the action of The mercaptan and the amine may beprovided (ii-normal butylamine and normal amyl merin about equal amounts, and the total need not. captanf', in total amount not much in excess of be in excess of 1 per cent:, and preferably 0.001 1 per cent. to-0.5 per cent. 6. A cracked petroleum distillate containing 50 As an illustrative example: Normal amyl merthe reaction products of ingredients thereof and captan and a di-normal butyl amine are added di-normal butylamine and normal amyl meroapto a cracked gasoline, and in" the proportion of tan, the total'amount of the amine and mercaptaii about 0.05 pound each per barrel of the gasoline, being not much in'excess of 1 per cent.

As another example; To a cracked naphtha ROBERT E. BURK. 

